Bending machine



Jan. 8; 1935. A. J. MASON ET AL 2 BENDING MACHINE Filed Dec. 6, 1952 2 Sheets-Sheet l v /0 'HIIIIIIIIII-IIIIIIIIII 1935- A. J. MASON ET AL -1,987,021

BENDING MACHINE Filed Dec. 6, 1932 2 Sheets-Sheet 2 4 Wmwroza driventiom among' oth"ers: -is= -the provisiomof "a said Patented Jan. 8, 1935 Bll 'sh." Manufacturing com an art ord; Cdnnt, a corporation of Connecticut;

A pplicatidmbecemberfi .3 claims. 1

ing -*tubs;--'and inore especially =to= machines fo'r bending tubes that are supplied witli'fpl'ates or firisfor radiatiompurposeswandan =objectof th'e ma'ehihethat issiniple im-construction; efficient offVarious-sorts maybe formed upen by 'the maohlnes"' Oriefforrrr of 'a' machine'- embodying this inven tioir '-'and -*in*th'e construction and use- 0f "which tlieobjects herein set outfi'as well as others; may b 'attairied is illii'strate'd in the acco'mpanying drawings, in which chine embiidyingtheinvention; with ans 'upper disk-andtlfebendingmechanismunounted'there 1 i Figure-*6 *i'sa similar"vievn'showing' thepositio in tubes operated 5 face of the plate and has an undercut groove 16 whichreceives'a movablefoimer'base- 1'7 supportirig -a'removable -former 18- which is attached rmer into holes inthebase, and as -shown bas'e asby means of pins-projecting from- I irf- -Fi'g .r- 4 *ofthedraWi-ngs:'--' The guidehasin' operatioh and-one-in thense-of which bendssecuredatitsend astationary fonner-195 The base '17--ha'sa n0tch 20-to'receive -a former mandrel E 21*secured'= 'at the endof a rod 22; the opposite in the notch ZO during bending operations.

A reta-ining and *spacing plate-=23 is provided with me'ans' for-"holding the movable and stationas herein vshown said *pla'te havinga 'seriesof I holes'fl t o recei-vepositioning'-pins 25 projecting ing-disk12; thetopof s'aid-ba'seplatebeing formed- I as' a guide? for a" positioning rplate=- '27" having a doveetailed shapedrib *on its under surface :fit -ting dove-tailed 'shaped"groove" -in the 'upper I of the drawings A positioning handle 28 having a positioning cam 29 is pivotally-attachd to-the' base plate 26, said cam contacting with'awear i? plate *30*in*the edge ofthepositioning 'plate- 27-,

wise =-along-one sideof a tube and fin" rest 33 l and I groove tdreceive a-guide ribBZeXtending-Iength 40.-. the positioirof the'parts'aftei the second'"'step-; in tobe een and saidirestis 'cut-awa'y to form -a the bendingfioperatio ing'plateis removed-iir*Figsff '-to8$ II This machine isjespecia-lly adapted for use in bending gtubesinto U shape; and" particularly 1 in ioi'mi-n'g aiongbendpr straightportion between'* adj tistablyseouredtothe block '31. I This rest has- ""a *le'ng-t wise-extendinggroove to receive a tube- 4032; shoulder?)@against which the 'fiIiS '35 secured to f; Ad arm 37 i's -securedto-and rises-from a suping and supportingmechanism hereinbe'fore' deand'ha'ving a screw threaded hole to re- -"c1amp-'screw-38 -having-a -hand-'wheel 39 r cei ve a as a means fdr-mpeiatingsaidscrew. The plate 1 1 I I 20v. f'supp'ortirfg mechanism includes a-base-plate ing operations.

lower end of the screw 38 to make contact with the plate 23 in a manner to permit turning movement of the bending devices independently of said screw, any suitable means for supporting the screw being employed.

An extension table 42 rests at its inner end upon a block 43 upon the plate 40 theouter end of said table being upheld as by a leg or other suitable means, (not shown herein), a'tube and the fins thereon resting upon said table during bend- In the operation of the device a tube with fins thereon is placed in the position as shown in I the bendin mechanism, said bending mechanism "including a rotatably mounted bending member, a guide secured to and carried by said bending member, a former rigidly attached to said guide,

Fig. 5, the bend in the tube to be located ina space between two sets of fins. 'The retaining plate 23 being in position with the formers 18 andilQ. in contact, as shown in Fig. 5, said plate being held by the screw 38, the handle"- leisoperated" to turn the parts into the position shownin Fig.

6, thereby creating a bend of ninety degrees in thetube, and as shown in Fig. 6. ,In this operation, as thetube is bent around the formers, it

is moved lengthwise, and this lengthwise movement is permitted by the tube and fin restg33 which slides on the backingblock 31- by reason,

of the fact that the fins 35 are in contactwith the shoulder 34.- This movement of the rest-33 tensions aspring 46 attafihed to, said restand to the tablel i2,said spring "returning said rest to its normal position :when the bending operation has ceased and the tube. with the fins thereon removed from the machine. Y

The plate 23 now being remoyed, and the-clamp screw being operated to release, the parts, the

formers 18, and 1 9 are placed in the separatedposition shown in.Fi g. 7, andthe plate 23 being placed inpo sition to retain the formers; and being held by the clamp screw the handle 1 4 -,is,oper ated toturn the parts to thepositionshown in; Fig. 8, in which it will be noted that a straight portion 45 is formed-in thebend ingtbe, tube.

Itwill be-readily seen that the U- bend, m y be; formed without displacing theiormers from they positions shown inFigs e 5 and 16, in which case.

thebend, will be circular throughout,,. ,orthe formers maybe placed farther apartgthan vis shown in the drawings andheld by the plate; 21f) in which case the straight portion 45 may beor any length desired.

We claim:

nism including a movably mounted bendingrnember a plurality of formers mounted on said bending memberv and separable one from another thereon, means for retaining said formers in dif; f-erent relative positions during bending operations on said bending member, and means for engaging articles tobe bent with said formers.

, 2. A bending machine including a support for the-bending mechanism, said bending mechanism including a rotatably mounted bending member, a

plurality of'formers mounted on said bending said formers.

i the bending mechanism, said bending: mechanism j including arotatably mounted bnding member, .a guide rigidly secured to said bending membeny e eth i d fi re i e ati b di m r :tions duringbending operations toyary the sizes;- of bends, and means forengaging articles to be;

bent, with saidiormers' e b d n e m;f ibei mk mec m;

1. A bending, machine including a support for,

the bending mechanism, saidbending mecha- I formers, and 'means for positioning said sup tions of said movable 'former member;

, tions of said movable iormer ,meniber, 1and1 ares t for the article to be bent, said restbeing movable;

3, A bending machine including a support for bending mechanism, said bending mechanism including a bending member, formers mounted on and carried by said bending member, one of said formers comprising aportion ofa hub around 5 ers in different relative bending positions, and 10 *means for enaging articles to be bent with said "formers; I

4., A bending machine including a support for aformer movably mounted on said guide, aretainer .engageable with said formers to retain them indifferent relative bending positions dur- 20 ing bending operations t o varythesizes of'bends,

and means for engaging articlesto'be bent with 5. 'A bending I machine including a. supportg for a one-piece former rigidly secured to saidguide, a two-piece former movably mountedron said; guide, a retainer engageable with said, fpl -mers to bent with said formers. 1 6. A bending machine including a support for e b di m h n sm; i din nism' including amending member, formers,-.

mounted on saidbending member and separable I, one from another, a retaining plate, engageable pins and holes on'said formers andbending plate positions, and means for engaging; articles to be i7. A. bending finachine-f as g a support tier" including a bending memberfiormers' mounted on-- said bending member to'lf orm a bndin an article,.l; gene of said formers being movablewith res'pect to ,the other, means for retain n isaid formers in difierent relative bending positions, article. sup;

porting mechanism positidnbdladjacent to said porting mechanism to accord with ,difierent, s

8. A bendingmachine including a supportiferi the bending mechanism, saidbending mechanism including'a bending member',form ers mountedon "saidbending member to form a bend inganar-v ticle,.one of said formers being movable withre? spect to another, .means for retainingsaid. orm ers difierent relative bending'i posiltio V ar -jticle' supporting mechanism {positioned adjacent to. said formers, means for positioning said ,s up-' porting mechanism to accord withdifierent, positoward and away from, said formers.

, ARTHUR J. MASON. WI L, TA R D.

tofjhold the formers in different relative bending; 

